Extramarital affairs the men involved are older women are often younger and unmarried. Now, if one can look beyond the glaring hot light of society's strong taboo against incest one will see the father/daughter relationship.
In the symbiotic attachment, the younger woman (daughter) finally gained the upper hand on the older woman (mother) the daughter now have her first love (father) the older man. The childhood wish is now complete. However, there is a price to pay for violating society's taboo against (father/daughter) incest. Often it is the man who must pay in the form of political, social, personal, and family embarrassments and public disgrace. A great price to pay: and a form of punishment for being on the wrong side of the incest taboo. Sometime the wayward individual themselves start the dominoes that exposes the behavior.
As for women of power and women who seek out powerful men, both are dancing to the same tune. But sex or power is not the driving force the goal is to gain the love of the "father." However, the woman who is powerful and the woman who seek powerful men take separate path to accomplish their goals. The personality of the individual and the child within determine which path taken.
The woman who seek powerful men most likely was "daddy's little girl" as a child, she put her father on a pedestal, if there is tension between mother and father she takes her father's position. However, deeply repressed is her anger with your father for choosing another woman (mother) over her but the hostility is unconscious she fear that if daddy learn her true feeling he would reject her.
The women who seek power in her own right do not place men (father) on pedestals or worship them in any significant way. Women who seek power instead of powerful men do not have a strong desire for approval from men (father) they are more comfortable competing with men. These women are not "daddy's little girl" they attitude toward father-figure is more aggressive and competitive.
However, do not be misled these women of power are also seeking the love of the father. These women also feel rejected and must compete with mother for father's love, but they take a different approach. The women of power, as a child, reject the "good girl, obedience mother" approach as a way to gain father's love. Instead, they become more like the father, aggressive, demanding, authoritative, and seek power as a tool to control and to achieve immediate gratification. These women become their fathers.
Women with power, unlike men with power, seldom involved in highly publicized sexual embarrassment. In fact, this behavior mirrors society in general in which older women have little appetite for the seduction of younger men. Women of power are not involved in public sexual embarrassment involving younger men. Women who are motivate to achieve power and authority as the ultimate goal of success may not see sex as a premium to reach their goals.
S. Freud, 1924, The Passing of the Oedipus-Complex